Iowa Derby Car Jump

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Iowa Derby Car Jump

Photograph by Joel Sartore

Iowa's derby stunts are always a blast: Gregory "Dr. Danger" Carpenter performed the Suicide Car Jump—a 50-foot, 60 mile-an-hour leap from a flaming ramp into a four-stack of junked cars—38 times last year, with three hospital trips and no life or health insurance. Despite cracked bones and burns, "I squeak by each time," he says.